so i have had my truck for about 5 months now its a 5.3L 2009 crew cab silverado. I've noticed that about every 2500-3000 miles I'm losing almost a quart ...

so i have had my truck for about 5 months now its a 5.3L 2009 crew cab silverado. I've noticed that about every 2500-3000 miles I'm losing almost a quart of oil from consumption,its not leaking either. I'm not sure if this is a common problem in these trucks but it just seems odd to me that a truck this new would be doing this. if anyone could chime in that would be great, thanks!

All engines require oil to lubricate and protect the load bearing and internal moving parts from wear including cylinder walls, pistons and piston rings. When a piston moves down its cylinder, a thin film of oil is left on the cylinder wall. During the power stroke, part of this oil layer is consumed in the combustion process. As a result, varying rates of oil consumption are accepted as normal in all engines.

Important: This rate only applies to personal use vehicles, under warranty, that are driven in a non-aggressive manner and maintained in accordance with the appropriate maintenance schedule, with less than 58,000 km (36,000 mi), or driven at legal speeds in an unloaded (for trucks) condition

Supercede:This bulletin is being revised to update the Model Years. Please discard CorporateBulletin Number 01-06-01-011 (Section 6 - Engine).

All engines require oil to lubricate and protect the load bearing and internal moving partsfrom wear including cylinder walls, pistons and piston rings. When a piston moves downits cylinder, a thin film of oil is left on the cylinder wall. During the power stroke, part ofthis oil layer is consumed in the combustion process. As a result, varying rates of oilconsumption are accepted as normal in all engines.

Oil ConsumptionThe accepted rate of oil consumption for engines used in the vehicles referenced is 0.946liter (1 qt) in 3200 km (2000 mi). This rate only applies to personal use vehicles, underwarranty, maintained in accordance with the appropriate maintenance schedule, with lessthan 58,000 km (36,000 mi), or 80,450 km (50,000 mi) for Cadillac, driven at legalspeeds in an unloaded (for trucks) condition.

Car manufacturers set the bar low so they don't have to repair/replace as many engines under warranty, This may sound like sales pitch but I have seen oil consumption decrease by changing brands of oil. The volatility effect, oil will evaporate from the the heat of the engine and APR sets the allowable limit at 15% and most oil are made to just get in under that limit. Costs more to lower the volatility.